<%--
  Created by IntelliJ IDEA.
  User: Bobby
  Date: 2020/8/15
  Time: 13:43
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<div id="page_nav">
    <c:if test="${requestScope.page.pageNo > 1}">
        <a href="${requestScope.page.url}&pageNo=1">首页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo - 1}">上一页</a>
    </c:if>

    <c:choose>
        <%--			总页码小于5的情况--%>
        <c:when test="${requestScope.page.pageTotal < 5}">
            <c:set scope="page" var="begin" value="1"></c:set>
            <c:set scope="page" var="end" value="${requestScope.page.pageTotal}"></c:set>
        </c:when>
        <%--				总页码大于5的情况--%>
        <c:when test="${requestScope.page.pageTotal > 5}">
            <c:choose>
                <%--						当页码为前3个时--%>
                <c:when test="${requestScope.page.pageNo <= 3}">
                    <c:set scope="page" var="begin" value="1"></c:set>
                    <c:set scope="page" var="end" value="5"></c:set>
                </c:when>
                <%--						当页码为最后3个时--%>
                <c:when test="${requestScope.page.pageNo >= requestScope.page.pageTotal - 2}">
                    <c:set scope="page" var="begin" value="${requestScope.page.pageTotal - 4}"></c:set>
                    <c:set scope="page" var="end" value="${requestScope.page.pageTotal}"></c:set>
                </c:when>
                <%--						普通情况时--%>
                <c:otherwise>
                    <c:set scope="page" var="begin" value="${requestScope.page.pageNo - 2}"></c:set>
                    <c:set scope="page" var="end" value="${requestScope.page.pageNo + 2}"></c:set>
                </c:otherwise>
            </c:choose>
        </c:when>
    </c:choose>

    <c:forEach begin="${begin}" end="${end}" var="i">
        <c:if test="${requestScope.page.pageNo == i}">
            【${i}】
        </c:if>
        <c:if test="${requestScope.page.pageNo != i}">
            <a href="${requestScope.page.url}&pageNo=${i}">${i}</a>
        </c:if>
    </c:forEach>

    <c:if test="${requestScope.page.pageNo < requestScope.page.pageTotal}">
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageNo + 1}">下一页</a>
        <a href="${requestScope.page.url}&pageNo=${requestScope.page.pageTotal }">末页</a>
    </c:if>

    共${requestScope.page.pageTotal}页，${requestScope.page.pageTotalCount}条记录 到第<input value="${requestScope.page.pageNo}" name="pn" id="pn_input"/>页
    <input id="searchPageBtn" type="button" value="确定">
</div>
